Stuttgart 2012 – wissenschaftliches Programm
Q 61.5: Vortrag
Freitag, 16. März 2012, 11:30–11:45, V7.01
A quantum electrodynamical description of x-ray phase-contrast imaging — •Jan Malte Slowik1,2 and Robin Santra1,2 — 1Center for Free-Electron Laser Science, DESY, Hamburg, Germany — 2Department of Physics, University of Hamburg, Hamburg, Germany
X-ray phase-contrast imaging is nowadays a widely used imaging technique for weakly absorbing samples, for example biological and medical tissues. So far x-ray phase-contrast imaging has been described by classical diffraction theory.
In this work we aim at a quantum electrodynamical understanding of x-ray phase-contrast imaging. We will show that electronically elastic scattering of the quantized electromagnetic field can fully account for the classical description of phase-contrast imaging. Since phase-contrast is a near-field phenomenon, the standard treatment of scattering within quantum electrodynamics has to be modified to take the position of the detector into account. Thus a careful choice of the observable is essential.